20105255066 has 8 divisors (see below), whose sum is σ = 32477719764. Its totient is φ = 9279348480.

The previous prime is 20105255039. The next prime is 20105255113. The reversal of 20105255066 is 66055250102.

It can be written as a sum of positive squares in 2 ways, for example, as 19191946225 + 913308841 = 138535^2 + 30221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386639495 + ... + 386639546.

Almost surely, 2^20105255066 is an apocalyptic number.

20105255066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20105255066 is a deficient number, since it is larger than the sum of its proper divisors (12372464698).

20105255066 is a wasteful number, since it uses less digits than its factorization.

20105255066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773279056.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 20105255066 in words is "twenty billion, one hundred five million, two hundred fifty-five thousand, sixty-six".